Stuffing-box for piston-rods.



n Patented Aug. l2, |902. D. DUGAN &. F. C. WATSON. X l

STUFFING BOX FR P|STON RODS..

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Patented' Aug; l2, '|9n2.

, n. w. DousAN & F. c. WATSON.

STUFFING BOX FUR PISTDNBODS.

(Applicmon med sept. s, 1901.)

(No Model.)

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Patented Ag. I2, |902. D W. UGAN F. C. WATSON.

STUFFING BOX FR PISTON H008: (Aplilimion med sept. s; 1901.)

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UNITED STATESV i PATENT OFFICE.

DAVID vW. DOUGAN AND FRANK C. WATSON, OF PHILADELPHIA, PENN SYLVANIA'.V

STUFFING-BOX FOR PISTON-RODS..

SPECIFICATION forming part of Letters Patent No. 706,536,1aateu August 12, 1902.

Application filed September 3, 1901. Serial No. 74,187. (No model.)

To @ZZ whom 7225 may concern:

Be it known that we, DAVID W. DOUGAN and FRANK C. WATSON, citizens of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Stuing-Boxes for Piston-Rods, Valve-Stems, and the Like, of which the following is a specification.

Our present invention pertains to improvements in piston-rod stuiing-boxes, the construction and advantages of which will be hereinafter pointed out, vreference being had to the annexed drawings, wherein- Figure l is a top plan view, partly in section, of the box; Fig. 2, a front face view; Fig. 3, a vertical section view on the line 3 3, Fig. l; Fig. 4, a sectional View on-the line 44 of Fig. l; Fig. 5, a longitudinal vertical sectional view; and Figs. 6 and 7 side and front elevations, respectively, of a modied form of the device.

The object of the present invention is to provide a superior stuffing-box, one in which a tight joint about the rod is elected and the rod thoroughly lubricated and one in which the parts may be readilyassembled aud firmly held in place.

In the drawings, A denotes the 'cylinderhead, and B the piston-rod, In the head there is mounted a sleeve C, formed with a central bearing for the rod and with a head D, which bears against the outerface of the cylinder. Longitudinal Ways or channels E are formed in the sleeve, said Ways communicating at their outer ends with an enlarged recess or chamber F, in whichis mounted a coiled spring G. The main body of the box is formed of two sections, a lower section H and an upper section I. Each of said sections is formed with outward-extending interlock ing ribs or flanges J, the outer faces whereof upon the upper and lower sides' are formed with a beveled and inclined surface. (See Figs. 3 and 4.) When the sections are assembled, these flanges form wedge-shaped dovetailed members, the narrower end ofthe wed ge being forward or away from the cylinder. U-shaped blocks or clamps K are employed to lock these members together. Inclined bearing-surfaces are formed upon the inner faces of these members, the inclination being the reverse oftthat of theribs, so that as. the blocks are slipped on and moved inwardly along the ribs the parts of the boxare securely and rigidly held together.

A suitable metallic packing Lis interposed between the head D of the sleeve and theinwardly-projecting ribs M of the box.

inclined or"concave, sothat the steam-pressure exerted on the packing would tend to force the packing in against the rod. The same action is secured by the spring. A seeond metallic packingN is mounted in the outer end of the box. Felt sections O P are mounted in the box and are held in position bythe metallic plates or half-rings Q and R,

'a pair being employed for each felt section.

' Ihese plates form a chamber for the reception of the oil, which, passing down around the rod, finds its way to the lower edges of the felt sections through a groove or channel S, formed in the lower box-section. An outer metallic bushing-ring T surrounds the rod and bears against the outer metallic packing N, and a shoulder formed on the ring also bears against the outer face of the box adjacent to the rod.

Stud-bolts U are employed for securing the box as a whole to the cylinderhead and also fas a means for holding the clamps in place Aand securing the face-plate As will be seen upomreference to Fig. 1,' the bolts arescrewed into the cylinder and pass V in position.

forwardly through the U-shaped clamping members K, suieient clearance being left for this purpose. The outerends of the bolts are threaded, and nuts Wvfmounted thereon bear directly against the clamps, serving to force them to place, and thereby binding the partspf the box together and also forcing the box as a whole closely to its seat in the head D of the sleeve C. Nuts W, as will Vbe seen in Fig. l, through openings X left in the face-plate V. Nuts Y are mounted on said threadedfpor; tion, and when screwed to place hold the faceplate in position. To more securely hold the upper and lower edges of the plate in place, supplemental bolts Z are employed, the bolts passing into the body of the box.

A sliding cover a is mounted on the upper 1, are externally threadedand passl As will be seen upon refereneeto Fig. 5, the facevofv the ribs against-'which the packing bears is IOO half of the box over the oil-opening therein. Aspring b, secured to its under side,"serves to normally hold the cover closed; and lugs or stops c and d, one carried by the cover and the other extending up from the box,

v prevent entire removal of the cover.

In Figs. 6 and 7 a modified form of construction is shown. Instead of having the cover lie in a horizontal plane the upper section of the box is extended upwardly and outwardly, forming a neck e, a 4sliding cover f being mounted thereon.

Having thus described our invention, what we claim isl. In combination with a two-part stuffingbox, clamps to secure said parts together; and means for securing the box in position, said means likewise acting on the clamps and causing the same to become effective, substantially as described.

2. In combination with a cylinder; bolts eX- tending out therefrom; a longitudinally-separable packing-box; clamps for securing the box together; and nuts mounted on the bolts, said nuts bearing on the clamps and serving to hold the box in position.

3. In combination with a cylinder, bolts extending out therefrom; a longitudinally-separable packing-box; Wedging-clamps for securing the parts thereof together; and nuts mounted on the bolts acting to force the.

clamps to place and to hold the box in position.

4. In combination with a cylinder; bolts ex-` tending out therefrom; alongitudinally-separable packing-box, each section thereof having abutting ilanges which when the parts are assembled form dovetailed wedges; wedgingclamps tittingon said anges, and nuts mount# ed on the bolts acting to force the clamps to place and to hold the box in position.

5. In combination with acylinder, bolts extending out therefrom; ay longitudinally-separable stuffing-box; each section thereof hav ing outwardly-projecting ribs adapted to abut with those of the adjacent section; wedgeshaped clamps longitudinally movable on the ribs; and nuts mounted on the bolts and bearing on the clamps moving the sameinwardly4 arable stuffing-box; wedging-clamps for securing the sections together; nuts mounted on the bolts and bearing on the outer ends of the clamps; a face-plate for the box, said plate having openings through which the bolts and nuts pass; and a second set of nuts secured upon the outer threaded face of the rst set, said second set bearing on the face-plate and holding the same in position.

8. In combination with a cylinder; a sleeve mounted therein; having passages for steam; a spring mounted in the end of the sleeve; a stuffing-box; means for securing said box in position; an oil-reservoir formed in the box; and metallic packing'interposed between the rounded inner face of the box and the outer end of the sleeve.

9. In combination with a cylinder; a sleeve mounted therein and having passages for steam therethrough; aspring mounted in the outer end of the sleeve; a stuffing-box secured to the cylinder over the sleeve; and a metallic packing interposed between the rounded inner face of the box and the end of the sleeve.

10. In combination with a cylinder; a longitudinally-separable stuffing-box; means for securingit together; metallic packing mounted in the outer ends of said box; sections Q and R'mounted Ain the box and forming an oil-reservoir intermediate the same; fibrous packingadjacent to said sections; and means for securing the box to the cylinder. e

ll. In combination with a cylinder; a longitudinally-separable stuffing-box; means for securing it together and to the cylinder; an oil-chamber formed in said box; and a sliding cover mounted on the box, said cover being provided with means for preventing its entire removal and likewise with means for maintaining it in a normally closed position.

i2. In combination with a cylinder; a longitudinally-separable stuffing-box; wedgingclamps for securing the sections together; bolts extendin g out from the cylinderand passing freely through the clamps; a bushing-collar T; a face-plate; nuts mounted on the bolts and bearing on the clamps; and a second set of nuts mounted on the threaded exterior of the rst set of nuts and serving to clamp the face-plate in position.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

DAVID w. DoucAN. FRANK c. wATsoN.

Witnesses:

. ANDREW W. COSTELLO,

BENJ. B. BRANNAN.

IOC

IOE 

